Early 2014 MacBook Air Won't Connect to Wi-Fi

I recently ordered a new modem from my ISP, and discovered that the horrendous firmware that came preinstalled blocked out all of my forwarded ports. Since this is one of those combo routers/modems and I already have a router, I called my ISP and told told them to bridge my connection to my main router. After having my connection bridged, my forwarded ports are functional, but my MacBook Air refuses to connect to Wi-Fi. Every other computer, tablet, and phone in the house connects just fine, so it really makes no sense to me. Any help would be appreciated.

Hi davidfromwinfield,
I am sure it is frustrating to have changed your network configuration and have one device not functioning as desired. One thing I would suggest to you would be to make certain that your router is set up correctly and that it uses settings as suggested in the following article -
iOS and OS X: Recommended settings for Wi-Fi routers and access points
http://support.apple.com/kb/HT4199
Thanks for using Apple Support Communities.
Best,
Brett L

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Height: 0.11-0.68 inch (0.3-1.7 cm)
Width: 12.8 inches (32.5 cm)
Depth: 8.94 inches (22.7 cm)
Weight: 2.96 pounds (1.35 kg)2
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Depth: 8.94 inches (22.7 cm)
Weight: 2.96 pounds (1.35 kg)3
Those look the same. To compare others start here.
Apple - Support - Technical Specifications
Click "Browse by Product" to search.
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Report generated November 5, 2014 at 11:54:17 AM CST
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MacBook Air (13-inch, Early 2014) (Verified)
MacBook Air - model: MacBookAir6,2
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4 GB RAM Not upgradeable
BANK 0/DIMM0
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BANK 1/DIMM0
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Color LCD 1440 x 900
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OS X 10.10 (14A389) - Uptime: 3 days 16:37:0
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APPLE SSD SD0128F disk0 : (121.33 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
disk0s2 (disk0s2) <not mounted> : 120.47 GB
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Apple Internal Memory Card Reader
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
Mac App Store and identified developers
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/Library/Extensions
[loaded] com.webroot.driver.WebrootSecureAnywhere (78 - SDK 10.9) Support
Launch Agents: ℹ️
[running] com.webroot.WRMacApp.plist Support
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist Support
[running] com.webroot.security.mac.plist Support
[running] com.webroot.webfilter.mac.plist Support
User Launch Agents: ℹ️
[loaded] com.google.keystone.agent.plist Support
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iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Safari ApplicationHidden (/Applications/Safari.app)
Internet Plug-ins: ℹ️
npwebroot: Version: 2.0.15 Support
FlashPlayer-10.6: Version: 15.0.0.152 - SDK 10.6 Support
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QuickTime Plugin: Version: 7.7.3
Default Browser: Version: 600 - SDK 10.10
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Password Manager
webfilter
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Flash Player Support
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143 MB Google Chrome Helper
120 MB com.apple.WebKit.WebContent
94 MB iTunes
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1.59 GB Active RAM
1.54 GB Inactive RAM
688 MB Wired RAM
11.57 GB Page-ins
108 MB Page-outs

Webroot is the likely culprit.    Most antivirus software slows down Macs.   In general good safe computing practices are sufficient to prevent viruses. No peer2peer software. No opening of attachments from unknown sources.     No opening of attachments that have extensions that Macs can execute (.exes are harmless unless Windows is on the Mac).   If you must have anti-virus ClamAV or Sophos are better.
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